Summary statistics for demo2017q2 dataset : by Jean Roth , jroth@nber.org , 8 Feb 2018 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- primaryid | 337,695 1.38e+08 6.08e+07 3.89e+07 1.36e+09 caseid | 337,695 1.34e+07 500346.5 3885345 1.38e+07 caseversion | 337,695 1.508216 1.392204 1 88 i_f_code | 0 i_f_code_num | 337,695 71.43734 .8992955 70 72 -------------+--------------------------------------------------------- event_dt | 161,369 1.25e+07 9730575 1957 2.02e+07 event_dt_num | 161,369 20422.42 1189.733 -8252 21002 mfr_dt | 321,392 2.02e+07 12596.35 1.99e+07 2.02e+07 mfr_dt_num | 321,392 20815.91 446.0827 9597 21000 init_fda_dt | 337,695 2.02e+07 4951.748 2.00e+07 2.02e+07 -------------+--------------------------------------------------------- init_fda_d~m | 337,695 20910.37 167.5612 15701 21000 fda_dt | 337,695 2.02e+07 83.39247 2.02e+07 2.02e+07 fda_dt_num | 337,695 20955.53 26.5863 20774 21000 rept_cod | 0 rept_cod_num | 337,695 751720.2 54648.31 687382 806982 -------------+--------------------------------------------------------- auth_num | 0 mfr_num | 0 mfr_sndr | 0 lit_ref | 0 age | 181,973 216.7615 1967.438 -.71 36141 -------------+--------------------------------------------------------- age_cod | 0 age_grp | 0 age_grp_num | 0 sex | 0 e_sub | 0 -------------+--------------------------------------------------------- wt | 63,634 75.65614 26.82172 0 401.44 wt_cod | 0 rept_dt | 336,919 2.02e+07 97559.41 2017 2.02e+07 rept_dt_num | 336,911 20954 58.64255 2840 21001 to_mfr | 0 -------------+--------------------------------------------------------- occp_cod | 0 reporter_c~y | 0 occr_country | 0 occp_cod_num | 333,299 7327.243 566.7066 6778 8072 by Jean Roth , jroth@nber.org , 8 Feb 2018